Rob, A full description is in: Reviews in Mineralogy Volume 36 Planetary Materials, J.J. Papike, editor Publisher: Mineralogical Society of America, 1998
"The mesosiderites are divided into three petrologic groups based on the orthopyroxene content (Hewins 1984, 1988: see Fig. 53). Compositional class A mesosiderite silicates are relatively basaltic in composition, containing more plagioclase and clinopyroxene. The compositional class B mesosiderite silicates contain a greater proportion of orthopyroxene, and are therefore more ultramafic. A unique mesosiderite from Antarctica, RKPA79015, contains almost exclusively orthopyroxene as its silicate phase (Prinz et al. 1982a), and is the sole member of compositional class C (Hewins 1988)................." ect....(pg 4-143) This is from 1998, and at least one more C type has come out of Morocco so the definition of class C might be better refined, ect. Devin Schrader ----- Original Message ----- From: "Rob Wesel" <[EMAIL PROTECTED]> To: "Meteorite List" <[EMAIL PROTECTED]> Sent: Tuesday, March 16, 2004 3:40 PM Subject: [meteorite-list] Mesosiderite types > Hello all- > Can anyone out there point me in the right direction as to the differences > between type A, B, and C mesosiderites...and what those differences mean? > Thanks in advance, > > Rob Wesel > ------------------ > We are the music makers... > and we are the dreamers of the dreams. > Willy Wonka, 1971 > > > > > ______________________________________________ > Meteorite-list mailing list > [EMAIL PROTECTED] > http://www.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
